Does the "LB" stand for anything? Or is it just for separating the sections?

I am ashamed to admit it, but, because all this happens within the same galaxy (the Milky Way), it has to be "interstellar" rather than "intergalactic". Interstellar doesn't sound as cool, does it?

I totally agree, I have searched and searched for a source that would tell me the full story of the Relay 314 Incident (FCW), and all I found was some stupid comic that focused entirely on the not-so-interesting origins of TIM.